Cylinder-core.



FLE. BURK.

CYLINDER GORE.

APPLIOATIQN FILED nu. 27, 1910.

lnurnnn- Hitman P. E. BURK.

CYLINDER GORE.

APPLIOATION FILED JAN. 27, 1910.

Patented Sept. 10, 1912 2 SHEETS-SHEET 2.

' UNITED STATES PATENT OFFICE.

FREDERICK E. BURR, or BAY CITY, MICHIGAN, AssIGNoR To EDWARD o EWEN., oF

' SAGINAW, MICHIGAN.

CYLINDER-CORE.

To all whom 'it may concern:

Bel itI known that l, Fnnonnicn E. lumi,

a citizen of the United States, anda resident of Bay City, in the county of Bay and State of Michigan, have invented a new and lniproved Cylinder-Core, of which the following is a speciiication.

This invent-ion relates to the art of inet-al founding, and the object ot my improvements is to provide cores `for the cylinders ot' engines and pumps whereby the casting of cylinders having a body` of a light metal lined with a thin shell of a harder heavier metal-is rendered feasible.

ln the accompanying drawings, Figure 1 is a vertical cross section of a cylinder of an explosion engine cast around niy improved core. Figs. 2 and 3 are transverse cross sections on the lines 2 2 and 3--3 ot Fig. 1 respectively. Fig. 4 is a View of my inlproved core together with auxiliary cores prepared for a cylinder of an explosion engine, part of the auxiliary cores being shown in cross Section. F ig. 5 is an end view of the same with one of the auxiliary cores omit-ted. Fig. G is a half cross section on the line (lof Fig. l.

Similar reference characters refer to like parts throughout the several views.

Lined cylinders for pumps and engines may be formed without the labor of boring the cylinders and litting in the liners by pouring the metal forming the body of the cylinder around the liner in the proper mold; Aluminum is the most desirable metal for the body of the cylinderdhecause ot its lightness in proportion to its strength, and cast iron liners havethe most satistaon tory 'wearing properties. Other metals such as bronze and steel may also be employed for liners.

Thisl invention relates to a core so constructed that the metal shell shall be supported in proper position within the mold, and so that the softer lighter metal can tion' around the core and shell to assun'ie the correct. torni and at the saine time hold the shell in position.

'lhe construction shown in the drawing is a cylinder of a three-port, twocycle, explo! sion-engine and the core for the saine. The lower or base part. l0 of the cylinder casting has the usual insuring-caps 11, and apertures l2 tunning hand holes. Extending upward 't'roni the base part is the evi/linear proper,

Specification of Letters Patent. V

Application filed January 27, 1910.

Patented sept. 1o, 1912. Serial` No. 540,297.

consisting of a liner 13, of Wear-resisting metal, preferably of cast iron, and the body comprising the shells 14 and 15 of lighter met-al and having a lower melting point than the liner, preferably aluniinum,`se arated by the Water spaces 16 and 17I in t e usual manner. The usual exhaustwports 18,

'intake ports 19 and intermediate ports 20 may be provided, as Well as the connection Q1 for the explosive vapor from the carbureter. The ports 19 and QOare shown connected by the by-pass 22. The liner may also be formed with these ports and with longitudinal and transverse grooves 24 as shown in the drawings. ',lhe cooling liquid may escape through the opening 25. The grooves preferably stop short of the ports. Any other desired irregularities may be formed on the shell. Y

The cylinder may be cast in the usual niolds,\vith the liner 13 either horizontal or vertical in the mold as desired. In Figs. l and 5 the manner of uniting thefcores is shown, Fig. a showing the main central core 28 having an extension 29, and one-half ot'- the cores for forming the ports and the spaces for the cooling liquid; these auxiliary cores being shown in cross section in Fig. 5. The large core 31 (F ig. 4) willV form the passage 1G for the cooling liquid and aperture 25. This core is not= shown in Fig. 5. The cores 32 will form the exhaust ports 18; the core the passage 21 for theexplosivevapor; the small core 31, the by-pass Q2; and the core 35 will form the passage 17 for the cooling liquid. The cores 3Q, 33 and 34 may be held in` position by pins 36 extending up from those portions of the niainicore 28. which project through. the ports in the liner 13. t

The main coreiQS should be formed from friable inaterial,which will stand consider able heat without crumbling and may be belted before or utter the liner is in position. The other cores will be ofi. the usual composition. p

lili/When the mold has been prepared and the" metal ttor the body melted, the liner 13 may be heated in any desired manner. After the liner suiiiciently heated, the auxiliary cores 31, 32, 33, 34- and 35 are secured in position and the united structure placed in;`

the liner 13, ridges being formed which extend into the grooves in the shell. If the outer surface of the shell 13 is left uninished it will usually be irregular enough'Y to insure a suicient union. The liner should always be made of a metal having a higher melting pointthan the shell that 'surrounds'ih Many modifications may be made in the details ofthe cores and liner Withoutdeparting from the spirit of my invention.

Having now explained my improvements, what I claim as my invention and desire to secure by Letters Patent is A core for combined aluminum andcas* iron cylinders, comprising a cylindrical shell of cast-iron of substantially even thickness throughout and having shallow grooves, and a body of baked friable material extending through the shell and projecting from the' ends thereof for supporting the same, and auxiliary cores for orming passages in the vWall'of the cylinder.

In testimony whereof I have signed this specification in the presence of t-Wo subscribing Witnesses.

` `FREDERICK E. BURK.

Witnesses:

NEWELL A. EDDY, Jr., EDWARD C. EWI-1N. 

